The susceptibility of cereal varieties to manganese deficiency

1943 ◽  
Vol 33 (4) ◽  
pp. 197-203 ◽  
Author(s):  
Patrick H. Gallagher ◽  
Thomas Walsh
Keyword(s):  
Sulphate Solution ◽  
Rapid Recovery ◽  
Manganese Deficiency ◽  
Disease Symptoms ◽  
Manganese Sulphate ◽  
Deficiency Symptoms ◽  
Cultural Conditions ◽  
Pot Experiments

A comparison is made, under similar cultural conditions in pot experiments, of the behaviour of a number of varieties of wheat, barley, rye and oats on two soils on which oats had previously displayed pronounced symptoms of manganese deficiency.All of these cereals were found to develop disease symptoms on these soils, rapid recovery from which invariably took place after the plants had been sprayed with 1% manganese sulphate solution. Variations in deficiency symptoms in the different cereals are indicated and observations on the course of the disease throughout the season are recorded for some thirty-two varieties.

Controlling manganese deficiency in sugarbeet with foliar sprays

1991 ◽  
Vol 116 (3) ◽  
pp. 351-358 ◽  
Author(s):  
P. J. Last ◽  
K. M. R. Bean
Keyword(s):  
Field Experiments ◽  
Early Summer ◽  
The Other ◽  
Manganese Deficiency ◽  
Manganese Sulphate ◽  
Mn Deficiency ◽  
Deficiency Symptoms ◽  
Foliar Sprays ◽  
Mn Concentrations

SUMMARYField experiments in 1987 and 1988 on peaty-loam, Mn-deficient soils of the Adventurers series in Cambridgeshire, UK, tested the response of sugarbeet to three forms of manganese fertilizer supplied as foliar sprays. The influence of a wetter and an adjuvant on manganese absorption and growth was also investigated.Cutonic and chelated forms of Mn, when applied at standard rates, were inefficient at increasing Mn concentrations in plants and alleviating deficiency symptoms during early summer. Mn concentrations in foliage increased rapidly after spraying with manganese sulphate, and most of the deficiency symptoms disappeared. These benefits were usually enhanced when manganese sulphate sprays were used with an adjuvant.Averaged over both years, yield without Mn was 8·83 t sugar/ha; the largest yield, 9·56 t/ha, was obtained with manganese sulphate plus adjuvant. Smaller benefits were obtained with the other forms of Mn. The adjuvant, when used with chelated Mn, appeared to depress sugar yields in both years. The likelihood of reducing the number of sprays required to control Mn deficiency on Fen soils was improved by using an adjuvant with manganous sulphate sprays.

scholarly journals Manganous oxide (MnO) as a fertilizer for controlling manganese deficiency in oats.

1968 ◽  
Vol 16 (3) ◽  
pp. 197-203
Author(s):  
K.W. Smilde
Keyword(s):  
Manganese Deficiency ◽  
Mn Deficiency ◽  
Pot Experiments

In pot experiments with a polder soil low in reducible Mn (extractant: 1N NH4OAc + 0.2% hydroquinone at pH 7), 50 kg/ha Mn applied as MnO (55 or 63.5% Mn) or MnSO4 (32.5% Mn) were as effective for preventing Mn deficiency in oats as spraying with MnSO4 or Mn-Rayplex (a polyflavonoid); reducible Mn in the soil increased to 50-60 ppm. With a more recent polder soil where Mn deficiency was not closely related to reducible Mn, but to C/N ratio, applying up to 176 kg/ha Mn did not completely control Mn deficiency. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Evaluating faba beans for resistance to ascochyta blight using detached organs

2000 ◽  
Vol 40 (5) ◽  
pp. 707 ◽  
Author(s):  
S. Kohpina ◽  
R. Knight ◽  
F. L. Stoddard
Keyword(s):  
Ascochyta Blight ◽  
Good Condition ◽  
Field Trials ◽  
Experimental Conditions ◽  
Susceptible Population ◽  
Disease Symptoms ◽  
Plant Parts ◽  
Cultural Conditions ◽  
Faba Beans ◽  
Moderately Resistant

Detached-organ techniques were developed, using either individual leaves or stem segments with attached leaves, for use in genetic studies on resistance to ascochyta blight in faba beans. A single isolate of Ascochyta fabae, A26, was used to infect the highly resistant population ILB 752, moderately resistant cultivar Fiord and highly susceptible population NEB 463. Cultural conditions were established that maintained the detached organs in good condition for more than the 10 days required for disease symptoms to be expressed. Detached organs were scored for presence, number and size of lesions and also for number of lesions bearing pycnidia. Spore suspensions of 5 x 102 to 2 x 106 per mL were used, with 5 x 104 providing as much infection as greater concentrations. Leaves and stems were taken from 3-, 5- or 7-week-old plants. Younger plant parts were more susceptible than older ones and plants aged 3–5 weeks provided adequate material for the tests. The susceptibility of the 3 accessions in these experimental conditions followed the order expected from field trials.

Effect of cultural practices on the manganese status of soil and citrus trees under irrigation.

1954 ◽  
Vol 5 (1) ◽  
pp. 31 ◽  
Author(s):  
J Connor
Keyword(s):  
Ammonium Sulphate ◽  
Soil Ph ◽  
Cultural Practices ◽  
Sweet Orange ◽  
Manganese Deficiency ◽  
Irrigation Area ◽  
Visual Symptoms ◽  
Deficiency Symptoms ◽  
Rough Lemon ◽  
Citrus Trees

The occurrence of manganese deficiency in citrus on an experimental orchard established in light horticultural soil in the Murrumbidgee Irrigation Area is reported. There is a relationship between visual symptoms of deficiency and the amount of manganese in the leaf. When the leaf manganese falls to 20 p.p.m., 50 per cent. of the trees show visual deficiency symptoms. Trees on Sweet Orange stock had less manganese and showed more visual deficiency symptoms than trees on Rough Lemon stock. A decrease in soil pH consequent on the addition of ammonium sulphate fertilizer led to a graduated increase in exchangeable soil manganese and leaf manganese. Bringing the calcareous subsoil to the surface consequent on digging trenches for laying agricultural drains led to acute manganese deficiency. Trees on plots tilled during the summer have greater leaf manganese contents than trees on sod plots or plots not tilled but kept free of weeds by herbicidal sprays, but these cultural treatments do not affect the exchangeable soil manganese. Possible reasons for the differences are discussed.

STUDIES IN PLANT MINERAL NUTRITION: II. THE ABSORPTION OF IRON AND MANGANESE BY DWARF KIDNEY BEAN, TOMATO, AND ONION FROM CULTURE SOLUTIONS

1954 ◽  
Vol 32 (5) ◽  
pp. 561-570 ◽  
Author(s):  
W. Leach ◽  
C. D. Taper
Keyword(s):  
Culture Solution ◽  
Manganese Deficiency ◽  
Salt Solutions ◽  
Optimum Range ◽  
Deficiency Symptoms ◽  
Plant Mineral Nutrition ◽  
Kidney Beans ◽  
Nutrient Solutions ◽  
Iron And Manganese ◽  
Dwarf Bean

Dwarf kidney beans and tomatoes were grown in complete nutrient solutions containing various concentrations of iron and manganese. It was found that the iron to manganese ratio in the culture solutions must be within a definite range in order to avoid deficiency symptoms in the experimental plants. For the dwarf bean this range was 1.5 to 3.0, and for the tomato it was 0.5 to 5.0. Concentration ratios outside the optimum range produced either iron or manganese deficiency symptoms. Concentrations below minimum values of both iron and manganese always produced deficiency symptoms irrespective of the ratio of iron to manganese in the culture solutions. An apparent antagonism between the absorption of iron and of manganese was observed with both beans and tomatoes grown in nutrient solutions. This antagonism was also found to occur with onions grown in solutions containing only the sulphates of the two metals. It was further found that with onions growing in single salt solutions of the sulphates of iron and manganese, the concentration of iron or manganese in the solutions did not affect the amounts of the metals absorbed by the plants from the solutions. The combined amount of iron plus manganese absorbed appeared to remain constant irrespective of the iron to manganese ratio in the culture solution.

Correction of manganese deficiency in barley crops on calcareous soils. 1. Manganous sulphate applied at sowing and as foliar sprays

1973 ◽  
Vol 13 (63) ◽  
pp. 434 ◽  
Author(s):  
DJ Reuter ◽  
TG Heard ◽  
AM Alston
Keyword(s):  
Root Growth ◽  
Grain Yield ◽  
Field Experiments ◽  
Foliar Application ◽  
Yield Response ◽  
Manganese Deficiency ◽  
Grain Yields ◽  
Deficiency Symptoms ◽  
Foliar Sprays ◽  
Shoot And Root Growth

Barley was grown in six field experiments from 1963 to 1969 on calcareous (>80 per cent CaCO3) soils of southern Yorke Peninsula, South Australia. Manganous sulphate was applied to the soil at sowing at 0 to 16 kg ha-1 Mn and to the plants as foliar sprays (1.3 - 1.8 kg ha-1 Mn per application). The effects on shoot and root growth, and manganese uptake in the shoots were measured during the season, and grain yields were determined. Application of manganous sulphate to the soil at sowing increased shoot and root growth and the manganese content of the shoots, and progressively delayed the appearance of manganese deficiency symptoms. However, all crops showed symptoms by the time of stem extension irrespective of the amount of manganese applied to the soil. The maximum grain yield response to soil application was obtained with 6 kg ha-1 Mn. Foliar application of manganous sulphate delayed the appearance of deficiency symptoms and increased grain yield in three of the experiments. Two or three sprays were more effective than a single spray, particularly where no manganese was applied to the soil at sowing. A combination of both soil and foliar application of manganous sulphate (6 kg ha-1Mn added to the soil at sowing and two or three foliar sprays) produced the highest grain yields and usually prevented the occurrence of deficiency symptoms.

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